Astronomers have found thousands of exoplanets — worlds beyond our solar system. Most of them are in single-star systems, ...

Thunderstorms are rare in the cold, dry Arctic, but a surprising event in August 2019 has scientists rethinking how these ...

Polar sea ice has reached record ... Image courtesy of National Snow and Ice Data Center. The graph above shows Antarctic sea ice extent on March 1, 2025, along with daily ice extent data for ...